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Bug 1567733 - qemu abort when migrate during guest reboot
Summary: qemu abort when migrate during guest reboot
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm-rhev
Version: 7.6
Hardware: x86_64
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Gerd Hoffmann
QA Contact: Yanan Fu
URL:
Whiteboard:
: 1520729 1596013 (view as bug list)
Depends On:
Blocks: 1519876 1558351 1599260
TreeView+ depends on / blocked
 
Reported: 2018-04-16 06:23 UTC by Yanan Fu
Modified: 2018-11-08 03:03 UTC (History)
12 users (show)

Fixed In Version: qemu-kvm-rhev-2.12.0-6.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-11-01 11:07:33 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
avocado test log (2.11 MB, application/x-tar)
2018-04-25 13:02 UTC, Yanan Fu 		no flags Details
trace log for qxl* and qemu_spice* and display* (12.53 MB, text/plain)
2018-04-25 13:04 UTC, Yanan Fu 		no flags Details
View All

Description Yanan Fu 2018-04-16 06:23:50 UTC 
Description of problem:
Hit this problem with automation test.
case name: migrate.with_reboot.tcp
Low priority,  need time to verify if it is a regression or not.


Version-Release number of selected component (if applicable):
kernel: kernel-3.10.0-862.el7.x86_64
qemu: qemu-kvm-rhev-2.10.0-21.el7_5.2.x86_64

How reproducible:
Low

Steps to Reproduce:
1. migrate VM (reel7.5) during reboot.


Actual results:


Expected results:


Additional info:
call Trace:
21:31:01 WARNI| No IP address of host was provided, using IP address on switch interface
21:31:01 DEBUG| Informing migration to spice client
21:31:01 DEBUG| (monitor avocado-vt-vm1.qmpmonitor1) Sending command 'client_migrate_info'
21:31:01 DEBUG| Send command: {'execute': u'client_migrate_info', 'arguments': {u'cert-subject': u'"C=CZ,L=BRNO,O=SPICE,CN=my Server10.73.224.145"', u'hostname': u'10.73.224.145', u'protocol': u'spice', u'port': 3001, u'tls-port': 3201}, 'id': 'NDmeCFXw'}
21:31:02 INFO | [qemu output] Thread 12 (Thread 0x7ff405267700 (LWP 22892)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c460e59 in syscall () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x000056092453a0c0 in qemu_event_wait (val=<optimized out>, f=<optimized out>) at /usr/src/debug/qemu-2.10.0/include/qemu/futex.h:26
21:31:02 INFO | [qemu output] #2  0x000056092453a0c0 in qemu_event_wait (ev=ev@entry=0x560924f45328 <rcu_call_ready_event>) at util/qemu-thread-posix.c:442
21:31:02 INFO | [qemu output] #3  0x0000560924549fbe in call_rcu_thread (opaque=<optimized out>) at util/rcu.c:249
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 11 (Thread 0x7ff40306a700 (LWP 22896)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45d567 in ioctl () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x0000560924271855 in kvm_vcpu_ioctl (cpu=cpu@entry=0x560926e80000, type=type@entry=44672) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2170
21:31:02 INFO | [qemu output] #2  0x0000560924271923 in kvm_cpu_exec (cpu=cpu@entry=0x560926e80000) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2007
21:31:02 INFO | [qemu output] #3  0x0000560924250b42 in qemu_kvm_cpu_thread_fn (arg=0x560926e80000) at /usr/src/debug/qemu-2.10.0/cpus.c:1138
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 10 (Thread 0x7ff402869700 (LWP 22897)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45d567 in ioctl () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x0000560924271855 in kvm_vcpu_ioctl (cpu=cpu@entry=0x560926eda000, type=type@entry=44672) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2170
21:31:02 INFO | [qemu output] #2  0x0000560924271923 in kvm_cpu_exec (cpu=cpu@entry=0x560926eda000) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2007
21:31:02 INFO | [qemu output] #3  0x0000560924250b42 in qemu_kvm_cpu_thread_fn (arg=0x560926eda000) at /usr/src/debug/qemu-2.10.0/cpus.c:1138
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 9 (Thread 0x7ff402068700 (LWP 22898)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45d567 in ioctl () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x0000560924271855 in kvm_vcpu_ioctl (cpu=cpu@entry=0x560926ef8000, type=type@entry=44672) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2170
21:31:02 INFO | [qemu output] #2  0x0000560924271923 in kvm_cpu_exec (cpu=cpu@entry=0x560926ef8000) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2007
21:31:02 INFO | [qemu output] #3  0x0000560924250b42 in qemu_kvm_cpu_thread_fn (arg=0x560926ef8000) at /usr/src/debug/qemu-2.10.0/cpus.c:1138
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 8 (Thread 0x7ff401867700 (LWP 22899)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45d567 in ioctl () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x0000560924271855 in kvm_vcpu_ioctl (cpu=cpu@entry=0x560926f14000, type=type@entry=44672) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2170
21:31:02 INFO | [qemu output] #2  0x0000560924271923 in kvm_cpu_exec (cpu=cpu@entry=0x560926f14000) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2007
21:31:02 INFO | [qemu output] #3  0x0000560924250b42 in qemu_kvm_cpu_thread_fn (arg=0x560926f14000) at /usr/src/debug/qemu-2.10.0/cpus.c:1138
21:31:02 INFO | Migrating to tcp:localhost:5200
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 DEBUG| (monitor avocado-vt-vm1.qmpmonitor1) Sending command 'migrate'
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 DEBUG| Send command: {'execute': 'migrate', 'arguments': {'uri': 'tcp:localhost:5200', 'blk': False, 'inc': False}, 'id': 'wLvNP0mW'}
21:31:02 INFO | [qemu output] Thread 7 (Thread 0x7ff401066700 (LWP 22900)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45d567 in ioctl () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x0000560924271855 in kvm_vcpu_ioctl (cpu=cpu@entry=0x560926f34000, type=type@entry=44672) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2170
21:31:02 INFO | [qemu output] #2  0x0000560924271923 in kvm_cpu_exec (cpu=cpu@entry=0x560926f34000) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2007
21:31:02 INFO | [qemu output] #3  0x0000560924250b42 in qemu_kvm_cpu_thread_fn (arg=0x560926f34000) at /usr/src/debug/qemu-2.10.0/cpus.c:1138
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 6 (Thread 0x7ff400865700 (LWP 22901)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45d567 in ioctl () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x0000560924271855 in kvm_vcpu_ioctl (cpu=cpu@entry=0x560926f56000, type=type@entry=44672) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2170
21:31:02 INFO | [qemu output] #2  0x0000560924271923 in kvm_cpu_exec (cpu=cpu@entry=0x560926f56000) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2007
21:31:02 INFO | [qemu output] #3  0x0000560924250b42 in qemu_kvm_cpu_thread_fn (arg=0x560926f56000) at /usr/src/debug/qemu-2.10.0/cpus.c:1138
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 5 (Thread 0x7ff400064700 (LWP 22902)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45d567 in ioctl () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x0000560924271855 in kvm_vcpu_ioctl (cpu=cpu@entry=0x560926f74000, type=type@entry=44672) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2170
21:31:02 INFO | [qemu output] #2  0x0000560924271923 in kvm_cpu_exec (cpu=cpu@entry=0x560926f74000) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2007
21:31:02 INFO | [qemu output] #3  0x0000560924250b42 in qemu_kvm_cpu_thread_fn (arg=0x560926f74000) at /usr/src/debug/qemu-2.10.0/cpus.c:1138
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 4 (Thread 0x7ff3ff863700 (LWP 22903)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45d567 in ioctl () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x0000560924271855 in kvm_vcpu_ioctl (cpu=cpu@entry=0x560926f92000, type=type@entry=44672) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2170
21:31:02 INFO | [qemu output] #2  0x0000560924271923 in kvm_cpu_exec (cpu=cpu@entry=0x560926f92000) at /usr/src/debug/qemu-2.10.0/accel/kvm/kvm-all.c:2007
21:31:02 INFO | [qemu output] #3  0x0000560924250b42 in qemu_kvm_cpu_thread_fn (arg=0x560926f92000) at /usr/src/debug/qemu-2.10.0/cpus.c:1138
21:31:02 INFO | [qemu output] #4  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #5  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 3 (Thread 0x7ff1f65ff700 (LWP 22904)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c7467ad in read () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #1  0x00007ff40e547ae1 in spice_backtrace_gstack () at /lib64/libspice-server.so.1
21:31:02 INFO | [qemu output] #2  0x00007ff40e54f457 in spice_log () at /lib64/libspice-server.so.1
21:31:02 INFO | [qemu output] #3  0x00007ff40e504308 in display_channel_update () at /lib64/libspice-server.so.1
21:31:02 INFO | [qemu output] #4  0x00007ff40e532b8b in handle_dev_update_async () at /lib64/libspice-server.so.1
21:31:02 INFO | [qemu output] qemu-kvm: Not a migration stream
21:31:02 INFO | [qemu output] #5  0x00007ff40e4fe29d in dispatcher_handle_recv_read () at /lib64/libspice-server.so.1
21:31:02 INFO | [qemu output] qemu-kvm: load of migration failed: Invalid argument
21:31:02 INFO | [qemu output] #6  0x00007ff40e504aab in watch_func () at /lib64/libspice-server.so.1
21:31:02 INFO | [qemu output] #7  0x00007ff40e0028f9 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
21:31:02 INFO | [qemu output] #8  0x00007ff40e002c58 in g_main_context_iterate.isra.22 () at /lib64/libglib-2.0.so.0
21:31:02 INFO | [qemu output] (Process terminated with status 1)
21:31:02 INFO | [qemu output] #9  0x00007ff40e002f2a in g_main_loop_run () at /lib64/libglib-2.0.so.0
21:31:02 INFO | [qemu output] #10 0x00007ff40e532f2a in red_worker_main () at /lib64/libspice-server.so.1
21:31:02 INFO | [qemu output] #11 0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #12 0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 2 (Thread 0x7ff403c6f700 (LWP 22979)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c745cc1 in do_futex_wait () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #1  0x00007ff40c745d87 in __new_sem_wait_slow () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #2  0x00007ff40c745e25 in sem_timedwait () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #3  0x0000560924539e57 in qemu_sem_timedwait (sem=sem@entry=0x560926a7d2d8, ms=ms@entry=10000) at util/qemu-thread-posix.c:289
21:31:02 INFO | [qemu output] #4  0x000056092453584c in worker_thread (opaque=0x560926a7d260) at util/thread-pool.c:92
21:31:02 INFO | [qemu output] #5  0x00007ff40c73fdd5 in start_thread () at /lib64/libpthread.so.0
21:31:02 INFO | [qemu output] #6  0x00007ff40c466b3d in clone () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] Thread 1 (Thread 0x7ff416b7dd00 (LWP 22891)):
21:31:02 INFO | [qemu output] #0  0x00007ff40c45bf5f in ppoll () at /lib64/libc.so.6
21:31:02 INFO | [qemu output] #1  0x00005609245361b9 in qemu_poll_ns (__ss=0x0, __timeout=0x7ffdf8f4dbf0, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
21:31:02 INFO | [qemu output] #2  0x00005609245361b9 in qemu_poll_ns (fds=<optimized out>, nfds=<optimized out>, timeout=timeout@entry=2999680380) at util/qemu-timer.c:334
21:31:02 INFO | [qemu output] #3  0x0000560924536fb8 in main_loop_wait (timeout=2999680380) at util/main-loop.c:255
21:31:02 INFO | [qemu output] #4  0x0000560924536fb8 in main_loop_wait (nonblocking=nonblocking@entry=0) at util/main-loop.c:515
21:31:02 INFO | [qemu output] #5  0x000056092421699a in main () at vl.c:1937
21:31:02 INFO | [qemu output] #6  0x000056092421699a in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4828
21:31:02 INFO | [qemu output] /tmp/aexpect_D40uGPeo/aexpect-HNDiWE.sh: line 1: 22891 Aborted                 MALLOC_PERTURB_=1 /usr/libexec/qemu-kvm -S -name 'avocado-vt-vm1' -sandbox off -machine pc -nodefaults -vga qxl -device pci-bridge,id=pci_bridge,bus=pci.0,addr=0x3,chassis_nr=1 -device intel-hda,bus=pci.0,addr=0x4 -device hda-duplex -chardev socket,id=qmp_id_qmpmonitor1,path=/var/tmp/avocado_08ZN5j/monitor-qmpmonitor1-20180413-213008-5syNFntP,server,nowait -mon chardev=qmp_id_qmpmonitor1,mode=control -chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/avocado_08ZN5j/monitor-catch_monitor-20180413-213008-5syNFntP,server,nowait -mon chardev=qmp_id_catch_monitor,mode=control -device pvpanic,ioport=0x505,id=idGRAE02 -chardev socket,id=serial_id_serial0,path=/var/tmp/avocado_08ZN5j/serial-serial0-20180413-213008-5syNFntP,server,nowait -device isa-serial,chardev=serial_id_serial0 -device virtio-serial-pci,id=virtio_serial_pci0,bus=pci.0,addr=0x5 -chardev socket,path=/var/tmp/avocado_08ZN5j/virtio_port-vs-20180413-213008-5syNFntP,nowait,id=idQWhOxa,server -device virtserialport,id=id6bOn7S,name=vs,bus=virtio_serial_pci0.0,chardev=idQWhOxa -object rng-random,filename=/dev/random,id=passthrough-lGLRcVsy -device virtio-rng-pci,id=virtio-rng-pci-0LqIY2JJ,rng=passthrough-lGLRcVsy,bus=pci.0,addr=0x6 -chardev socket,id=seabioslog_id_20180413-213008-5syNFntP,path=/var/tmp/avocado_08ZN5j/seabios-20180413-213008-5syNFntP,server,nowait -device isa-debugcon,chardev=seabioslog_id_20180413-213008-5syNFntP,iobase=0x402 -device ich9-usb-ehci1,id=usb1,addr=0x1d.7,multifunction=on,bus=pci.0 -device ich9-usb-uhci1,id=usb1.0,multifunction=on,masterbus=usb1.0,addr=0x1d.0,firstport=0,bus=pci.0 -device ich9-usb-uhci2,id=usb1.1,multifunction=on,masterbus=usb1.0,addr=0x1d.2,firstport=2,bus=pci.0 -device ich9-usb-uhci3,id=usb1.2,multifunction=on,masterbus=usb1.0,addr=0x1d.4,firstport=4,bus=pci.0 -device nec-usb-xhci,id=usb2,bus=pci.0,addr=0x7 -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=0x8 -drive id=drive_image1,if=none,snapshot=off,aio=native,cache=none,format=qcow2,file=/home/kvm_autotest_root/images/rhel75-64-virtio-scsi.qcow2 -device scsi-hd,id=image1,drive=drive_image1 -device virtio-net-pci,mac=9a:e3:e4:e5:e6:e7,id=id8UtUIz,vectors=4,netdev=idq2Gn0A,bus=pci.0,addr=0x9 -netdev tap,id=idq2Gn0A,vhost=on,vhostfd=21,fd=20 -m 8192 -smp 8,maxcpus=8,cores=4,threads=1,sockets=2 -cpu 'Opteron_G4',+kvm_pv_unhalt -device usb-tablet,id=usb-tablet1,bus=usb2.0,port=1 -spice port=3000,password=123456,addr=0,tls-port=3200,x509-dir=/tmp/spice_x509d,tls-channel=main,tls-channel=inputs,image-compression=auto_glz,zlib-glz-wan-compression=auto,streaming-video=all,agent-mouse=on,playback-compression=on,ipv4 -rtc base=utc,clock=host,driftfix=slew -boot order=cdn,once=c,menu=off,strict=off -no-hpet -enable-kvm -watchdog i6300esb -watchdog-action reset -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0xa
21:31:02 INFO | [qemu output] (Process terminated with status 134)
21:31:03 WARNI| avocado-vt-vm1 is not alive. Can't query the register status
21:31:04 DEBUG| Waiting for migration to complete (2.002236 secs)
Comment 2 Dr. David Alan Gilbert 2018-04-18 15:23:30 UTC 
Hi,
  You say the reproducability is low - how low?  Can you reproduce it if you just
sit that avocado test in a loop?
Can you attach the full avocado log section for the test?
Comment 3 Yanan Fu 2018-04-25 12:58:58 UTC 
   
(In reply to Dr. David Alan Gilbert from comment #2)
> Hi,
>   You say the reproducability is low - how low?  Can you reproduce it if you
> just
> sit that avocado test in a loop?

In my testing, about 1/10.
Yes, i can reproduce it with avocado test in a loop.


Now, i basically sure this is not a regression issue.
It should be a same issue with bz 1520729

> Can you attach the full avocado log section for the test?

Full avocado log was added in the attachment, and also trace log that mentioned in 1520729 comment 18:

# stap -e 'probe qemu.kvm.simpletrace.qxl* {} probe qemu.kvm.simpletrace.qemu_spice* {} probe qemu.kvm.simpletrace.display* {}' -x $pidof_qemu-kvm >/tmp/trace_$pidof_qemu_kvm
# /usr/share/qemu-kvm/simpletrace.py --no-header /usr/share/qemu-kvm/trace-events-all /tmp/trace_$pidof_qemu_kvm
Comment 4 Yanan Fu 2018-04-25 13:02:42 UTC 
Created attachment 1426623 [details]
avocado test log
Comment 5 Yanan Fu 2018-04-25 13:04:22 UTC 
Created attachment 1426624 [details]
trace log for qxl* and qemu_spice* and display*
Comment 6 Dr. David Alan Gilbert 2018-04-25 13:11:37 UTC 
Yeh I agree it looks like 1520729;
Gerd: Dupe?
Comment 7 Gerd Hoffmann 2018-04-26 08:16:20 UTC 
(In reply to Dr. David Alan Gilbert from comment #6)
> Yeh I agree it looks like 1520729;
> Gerd: Dupe?

Likely.  And we have a trace log (comment 5) now, cool.
Comment 8 Gerd Hoffmann 2018-04-26 09:48:09 UTC 
https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=15904090
please test
Comment 9 Yanan Fu 2018-04-27 11:45:38 UTC 
(In reply to Gerd Hoffmann from comment #8)
> https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=15904090
> please test

Hi Gerd,
Repeat the same case for 80 times with the given QEMU build, all pass.
So i think this build work ~
Comment 10 Gerd Hoffmann 2018-04-27 11:57:56 UTC 
https://patchwork.ozlabs.org/patch/905667/
Comment 11 Gerd Hoffmann 2018-06-13 11:01:03 UTC 
upstream commit 5bd5c27c7d284d01477c5cc022ce22438c46bf9f
Comment 13 Gerd Hoffmann 2018-06-27 06:21:10 UTC 
*** Bug 1520729 has been marked as a duplicate of this bug. ***
Comment 14 Miroslav Rezanina 2018-07-01 03:20:32 UTC 
Fix included in qemu-kvm-rhev-2.12.0-6.el7
Comment 16 Bandan Das 2018-07-10 17:22:34 UTC 
*** Bug 1596013 has been marked as a duplicate of this bug. ***
Comment 17 Yanan Fu 2018-07-26 12:49:43 UTC 
Repeat the testing, and checked in with three version.
qemu-kvm-rhev-2.12.0-6.el7,  qemu-kvm-rhev-2.12.0-7.el7, qemu-kvm-rhev-2.12.0-8.el7, can not hit this issue again.

Move to VERIFIED.
Comment 18 errata-xmlrpc 2018-11-01 11:07:33 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3443
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